Name
isreal — check if a variable as real or complex entries
Calling Sequence
t=isreal(x)
t=isreal(x,eps)
Parameters
- x
vector or matrix with floating point entries or
coefficients
- t
a boolean
Description
isreal(x) returns true if x is
stored as a real variable and false if x is stored with
an (eventually zero) imaginary part.
isreal(x,eps) returns true if
x is stored as a real variable or if maximum absolute
value of imaginary floating points is less or equal than
eps.
Examples
isreal([1 2])
isreal(1+0*%i)
isreal(1+0*%i,0)
isreal(1+%s)
isreal(sprand(3,3,0.1))